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Encryption (GCSE Computing)

The following is a GCSE Computing test covering 'Encryption' from the broader topic 2. Data Transmission. The test is geared towards the CAMBRIGE-IGCSE exam board style syllabus.
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Which of the following is an example of a hash algorithm used to verify file integrity?
Why might a VPN be used in combination with encryption in transit?
Which of the following best describes encryption?
Which algorithm is an example of symmetric (shared-key) encryption commonly used today?
Which of the following correctly pairs an algorithm with its primary purpose?
Which of the following is a likely indicator that a website’s SSL/TLS certificate is invalid or untrusted?
What is the main purpose of using a public key in asymmetric encryption?
Which of the following best describes Diffie–Hellman key exchange?
Which of the following is a property of a one-way hash function?
Which term describes encryption applied to data while it is being sent over a network?
How does using multifactor authentication (MFA) enhance security when combined with encryption?